Found this on the Internet; I think this explains it: "Prior to 2011, Russia moved its clocks backward and forward on the same annual cycle as Europe. On 27 March 2011, clocks were advanced as usual, but they did not go back that October, effectively making Moscow Time UTC+4 permanently. On 26 October 2014, following another change in the law, the clocks in most of the country were moved back one hour, but DST was not reintroduced; Moscow Time returned to UTC+3 permanently."